Worked on stabilizing the user interface for the SiYuan repository by addressing a window controls overlay issue that previously obscured toolbar buttons and hindered usability. Focused on improving accessibility and consistency across platforms, the solution involved reviewing and adjusting CSS and SCSS layout rules to prevent overlay conflicts and ensure the toolbar remained visible. Applied front end development and UI/UX design skills to validate changes and reduce user friction, aligning with the project’s emphasis on a clean, accessible interface. The work contributed to overall UI stability, resolving a key usability bug and supporting a more seamless experience for SiYuan users.